#include <stdio.h>
#include <string.h>

unsigned int fakultaet (unsigned int n)
{
    unsigned int ergebnis = 1;
    for (unsigned int faktor = 1; faktor <= n; faktor++)
    {
        ergebnis *= faktor;    
    }
    return ergebnis;
}

int
main()
{
    for (unsigned int k = 1; k <= 15; k++)
    {
        printf ("%d! = %d\n", k, fakultaet (k));
    }
}